[Suffolkcleaners]

Hi Bungle

Thanks for that. Jeez. Would only take 3 hours 20 to fill my 1000 litre tank. What sort of cost are you looking at? My PF 450 gpd was only £500 quid or so. Having said that a trickle system is fine as I’m a one man band and don’t need massive amounts of water however the tap is almost on constantly BUT because we have a sub meter Anglian water refund a massive percentage back.

So not sure whether it would be worth the changeover mainly as I said because I can basically claim most of it back. It’s more the convenience of making it a lot quicker I guess.

[Suffolkcleaners]

Plus saving water and the planet etc etc. I do appreciate there are benefits. Plus if I needed to make water quickly for whatever reason. Would being in a really hard water area make any difference to the 300 litres per hour?

[mjm]

Plus saving water and the planet etc etc. I do appreciate there are benefits. Plus if I needed to make water quickly for whatever reason. Would being in a really hard water area make any difference to the 300 litres per hour?

the 40 40 system is a complete game changer   you will be shocked how many ltres of 00 tds you can make  when you know how to use one

[NWH]

400ltrs in 24hrs lol something is either blocked or your water pressure must be about 10psi.

[Suffolkcleaners]

400ltrs in 24hrs lol something is either blocked or your water pressure must be about 10psi.

Nope it’s always been that from new. Seems to be slower in winter. As far as I’m aware the pressure is fine. I have just come to accept that for less than £500 you pay for what you get. I will defo look into this 40/40 option

[Suffolkcleaners]

Right guys I’ve just tested my before DI (After RO) reading and its 037.

Any ideas on why twinning them up has not saved on resin at all? Sounds to me like I might as well just use the one bigger vessel and keep the smaller one as a spare.

[Simon Trapani]

I twin di with RO but am not convinced it’s worth it. Used to gave one big vessel but found two smaller ones easier to empty. I do as Bungle described earlier. I think it just fully exhausts the first vessel. But to be honest since getting a booster pump I’m now 1ppm out of RO so mine should last months. Could even go without resin.

[Spruce]

Right guys I’ve just tested my before DI (After RO) reading and its 037.

Any ideas on why twinning them up has not saved on resin at all? Sounds to me like I might as well just use the one bigger vessel and keep the smaller one as a spare.

Double di is a 'bandaid' but hasn't addressed the basic problem which you need to address.

Your r/o is only removing 90% of the dissolved solids in your tap water if its 400ppm.  Your membrane should be removing 97 to 98% of the dissolved solids in your water leaving you around 12 to polish off. 94% was considered the cutoff point, possibly higher for you because of your high tap water tds.

This basically means your membranes probably need replacing.

Living in a high calcium area doesn't help.

Obviously having good water pressure at the tap is important. You can't just think your water pressure is ok. You have to test it with a pressure guage. Plumbing stores or Screwfix sell them.

The next is to check to see what your pure to waste ratio is when producing water. I'm guessing at your high TDS you would need a ratio of around 3 litres  of waste to 1 litre of pure - maybe a bit less waste to 1 litre of pure.

If you are going to replace membranes you must get them from a supplier that sells quality USA made membranes such as Filmtec or Axeon. Cheap Chinese copies look good price wise but don't perform over the long run. 

www.daqua.co.uk

 

[Suffolkcleaners]

Right guys I’ve just tested my before DI (After RO) reading and its 037.

Any ideas on why twinning them up has not saved on resin at all? Sounds to me like I might as well just use the one bigger vessel and keep the smaller one as a spare.

Double di is a 'bandaid' but hasn't addressed the basic problem which you need to address.

Your r/o is only removing 90% of the dissolved solids in your tap water if its 400ppm.  Your membrane should be removing 97 to 98% of the dissolved solids in your water leaving you around 12 to polish off. 94% was considered the cutoff point, possibly higher for you because of your high tap water tds.

This basically means your membranes probably need replacing.

Living in a high calcium area doesn't help.

Obviously having good water pressure at the tap is important. You can't just think your water pressure is ok. You have to test it with a pressure guage. Plumbing stores or Screwfix sell them.

The next is to check to see what your pure to waste ratio is when producing water. I'm guessing at your high TDS you would need a ratio of around 3 litres  of waste to 1 litre of pure - maybe a bit less waste to 1 litre of pure.

If you are going to replace membranes you must get them from a supplier that sells quality USA made membranes such as Filmtec or Axeon. Cheap Chinese copies look good price wise but don't perform over the long run. 

www.daqua.co.uk

Hi Spruce

Thanks for that. Do you know I did think to myself it could have very likely been the membranes. Reason being (my own fault) I have been really lapse at changing the filters on the RO and not flushing as much as I probably should have. The filters I understand should be changed every  3 months. I left it a year at one point without changing.

Upon my own stupid neglect I totally agree I’ve probably knackered the membranes. Although like I said it was never producing any more than 400 litres in 24 hours so for more faster production it seems to me it may be worth considering a 40/40 and looking after it better this time.  Cheers for advice 👍

[JandS]

It's a 450 gpd Ro.....that's US gallons so your production is about right.

[Smudger]

450 us gallons is 1700 litres so it's running at about 1/3 of what it should be - membranes are f@@ked at 37 tds  - get new ones and get a booster pump, this will increase pressure and make the ro work better and get you up to 1,000 litres per 24 hours

Darran

[Smudger]

It's easy to say after the event but for £500 you could have got an ro4040 housing and membrane plus a prefilter or 2 off eBay

But get yourself a pump and that ro will do you right for years

Darran

[Suffolkcleaners]

Cheers Darran

Can you advise firstly the best place to get membranes? Are they easy to change?

Also best place/make of booster pump? Again is this easy to fit?

Cheers in advance. Ps if I can realistically get 1000 litres in 24 hours then membranes and booster pump is the way to go I’m sure 👍

[Smudger]

I can't- I  never had one of those types of ro  - filters should be straightforward - a lot of booster pumps for that size are a diaphragm pump like you use for water fed pole - I don't know if something the Clarke pump or dab mains pumps are too powerful

If you need one I have a vey air diaphragm pump that's 9 lpm ( something like that ) you can have if you pop over to collect

Darran

[Bungle]

Cheers Darran

Can you advise firstly the best place to get membranes? Are they easy to change?

Also best place/make of booster pump? Again is this easy to fit?

Cheers in advance. Ps if I can realistically get 1000 litres in 24 hours then membranes and booster pump is the way to go I’m sure 👍

Ring Doug at Daqua. He knows his stuff and will advise you. https://www.daqua.co.uk/index.html

[Suffolkcleaners]

That’s very kind of you Darran. Thank you. You are in Norfolk aren’t you? I’m Suffolk based near Ipswich. No idea how to attach it mind your Lol.

[Suffolkcleaners]

Cheers Darran

Can you advise firstly the best place to get membranes? Are they easy to change?

Also best place/make of booster pump? Again is this easy to fit?

Cheers in advance. Ps if I can realistically get 1000 litres in 24 hours then membranes and booster pump is the way to go I’m sure 👍

Ring Doug at Daqua. He knows his stuff and will advise you. https://www.daqua.co.uk/index.html

Cheers Bungle.

[Smudger]

Just east of Norwich - fitting is easy

Darran

[Suffolkcleaners]

Thank you Darran. I’ve just looked up your website and might be a bit further away than I thought but very grateful for such a kind offer. Thanks buddy 👍👍👍

[Suffolkcleaners]

I’ve just sent you a message Darran. Cheers buddy 👍